angular-docs-cn/modules/angular2/test/compiler/change_detector_compiler_sp...

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import {
ddescribe,
describe,
xdescribe,
it,
iit,
xit,
expect,
beforeEach,
afterEach,
AsyncTestCompleter,
inject,
beforeEachBindings
} from 'angular2/test_lib';
import {bind} from 'angular2/src/core/di';
import {CONST_EXPR} from 'angular2/src/core/facade/lang';
import {MapWrapper} from 'angular2/src/core/facade/collection';
import {Promise} from 'angular2/src/core/facade/async';
import {ChangeDetectionCompiler} from 'angular2/src/compiler/change_detector_compiler';
import {
CompileDirectiveMetadata,
CompileTypeMetadata
} from 'angular2/src/compiler/directive_metadata';
import {
SourceModule,
SourceExpression,
SourceExpressions,
moduleRef
} from 'angular2/src/compiler/source_module';
import {TemplateParser} from 'angular2/src/compiler/template_parser';
import {
ChangeDetectorGenConfig,
ChangeDetectionStrategy,
ChangeDispatcher,
DirectiveIndex,
Locals,
BindingTarget,
ChangeDetector
} from 'angular2/src/core/change_detection/change_detection';
import {evalModule} from './eval_module';
import {TEST_BINDINGS} from './test_bindings';
import {TestContext, TestDispatcher, TestPipes} from './change_detector_mocks';
import {codeGenValueFn, codeGenExportVariable} from 'angular2/src/compiler/util';
// Attention: These module names have to correspond to real modules!
const THIS_MODULE = 'angular2/test/compiler/change_detector_compiler_spec';
var THIS_MODULE_REF = moduleRef(THIS_MODULE);
export function main() {
describe('ChangeDetectorCompiler', () => {
beforeEachBindings(() => TEST_BINDINGS);
var parser: TemplateParser;
var compiler: ChangeDetectionCompiler;
beforeEach(inject([TemplateParser, ChangeDetectionCompiler], (_parser, _compiler) => {
parser = _parser;
compiler = _compiler;
}));
describe('compileComponentRuntime', () => {
function detectChanges(compiler: ChangeDetectionCompiler, template: string,
directives: CompileDirectiveMetadata[] = CONST_EXPR([])): string[] {
var type = new CompileTypeMetadata({name: 'SomeComp'});
var parsedTemplate = parser.parse(template, directives, 'TestComp');
var factories =
compiler.compileComponentRuntime(type, ChangeDetectionStrategy.Default, parsedTemplate);
return testChangeDetector(factories[0]);
}
describe('no jit', () => {
beforeEachBindings(() => [
bind(ChangeDetectorGenConfig)
.toValue(new ChangeDetectorGenConfig(true, true, false, false))
]);
it('should watch element properties', () => {
expect(detectChanges(compiler, '<div [el-prop]="someProp">'))
.toEqual(['elementProperty(elProp)=someValue']);
});
});
describe('jit', () => {
beforeEachBindings(() => [
bind(ChangeDetectorGenConfig)
.toValue(new ChangeDetectorGenConfig(true, true, false, true))
]);
it('should watch element properties', () => {
expect(detectChanges(compiler, '<div [el-prop]="someProp">'))
.toEqual(['elementProperty(elProp)=someValue']);
});
});
});
describe('compileComponentCodeGen', () => {
function detectChanges(compiler: ChangeDetectionCompiler, template: string,
directives: CompileDirectiveMetadata[] = CONST_EXPR([])):
Promise<string[]> {
var type = new CompileTypeMetadata({name: 'SomeComp'});
var parsedTemplate = parser.parse(template, directives, 'TestComp');
var sourceExpressions =
compiler.compileComponentCodeGen(type, ChangeDetectionStrategy.Default, parsedTemplate);
var testableModule = createTestableModule(sourceExpressions, 0).getSourceWithImports();
return evalModule(testableModule.source, testableModule.imports, null);
}
it('should watch element properties', inject([AsyncTestCompleter], (async) => {
detectChanges(compiler, '<div [el-prop]="someProp">')
.then((value) => {
expect(value).toEqual(['elementProperty(elProp)=someValue']);
async.done();
});
}));
});
});
}
function createTestableModule(source: SourceExpressions, changeDetectorIndex: number):
SourceModule {
var resultExpression =
`${THIS_MODULE_REF}testChangeDetector(([${source.expressions.join(',')}])[${changeDetectorIndex}])`;
var testableSource = `${source.declarations.join('\n')}
${codeGenExportVariable('run')}${codeGenValueFn(['_'], resultExpression)};`;
return new SourceModule(null, testableSource);
}
export function testChangeDetector(changeDetectorFactory: Function): string[] {
var dispatcher = new TestDispatcher([], []);
var cd = changeDetectorFactory(dispatcher);
var ctx = new TestContext();
ctx.someProp = 'someValue';
var locals = new Locals(null, MapWrapper.createFromStringMap({'someVar': null}));
cd.hydrate(ctx, locals, dispatcher, new TestPipes());
cd.detectChanges();
return dispatcher.log;
}